Fulltext TSBs

Technical Service Bulletins

TSB
98-15-6
  • EXHAUST – EXHAUST LEAK AT EXHAUST MANIFOLDS – VEHICLES EQUIPPED WITH 7.0L OR 7.5L ENGINE
Publication Date: AUGUST 3, 1998

LIGHT TRUCK:
1993-1996 E-350
1993-1997 F SUPER DUTY, F-250 HD, F-350
MEDIUM/HEAVY TRUCK:
1992-1997 F-700, F-800

This TSB article is being republished in its entirety to correct the Labor Operation Times listed.

ISSUE:

An exhaust leak at the exhaust manifolds may be evident on some vehicles. This may be due to heat causing a reduction in bolt torque on the exhaust manifolds.

ACTION:

Install new exhaust manifold bolts. Refer to the following Service Procedure and Part Application Chart for details.

SERVICE PROCEDURE

  1. If an exhaust leak exists at the exhaust manifold due to a reduction in bolt torque, remove the manifold bolts and the exhaust manifold and check the overall flatness of the manifold. The manifold should not exceed 0.25mm (0.010″) out-of-flat. Refer to the appropriate model/year Service Manual for manifold removal procedures.
  2. If the vehicle is covered under the emissions warranty period, replace the manifold if it is out-of-flat. If the vehicle is out of the emissions warranty period, resurface the exhaust manifold.

    NOTE:IF THE MANIFOLD IS TO BE RESURFACED, THE BOLTS MUST BE SHORTENED TO ACCOMMODATE THE EXHAUST MANIFOLD. THE BOLTS SHOULD HAVE THE LEADING “DOGPOINT” REMOVED TO PREVENT BOTTOMING INTO THE HOLE.

  3. Install the manifold using new mounting hardware, but DO NOT USE WASHERS TO INSTALL THE MANIFOLD. Torque the bolts to 34-47 N-m (25-35 lb-ft).

    NOTE:THERE SHOULD NOT BE ANY TYPE OF GASKET USED BETWEEN THE EXHAUST MANIFOLD AND THE CYLINDER HEAD.

  4. Check all exhaust system fittings loosened during repair for adequate tightness and allow engine to warm up. Recheck exhaust system for leaks and repair as required.

    PART APPLICATION
    Engine SizePartPart NumberQuantity
    7.0LBolt – 3/8″-16×2.87391730-S1013
    7.0LStud – 3/8″-16×4.10391732-S1017
    7.0LBolt – 3/8″-16×1.74391729-S1014
    7.0LStud – 3/8″-16×2.87391845-S1012
    7.0L MFI/LPGManifold – RHF1HZ-9430-B1
    7.0L MFI/LPGManifold – LHF1HZ-9431-B1
        
    7.5LBolt – 3/8″-16×2.87391730-S1014
    7.5LStud – 3/8″-16×4.10391732-S1014
    7.5LStud – 3/8″-16×2.87391845-S1017
    7.5LBolt – 3/8″-16×1.74391729-S1011 (F-Series)
    7.5LStud – 3/8″-16×2.87391845-S1011 (Econoline)
    7.5L E/F 250-350Manifold – RHF4TZ-9430-C1
    7.5L E/F 250-350Manifold – LHF4TZ-9431-C1
    7.5L F-53 S/DManifold – RHF5TZ-9430-B1
    7.5L F-53 S/DManifold – LHF5TZ-9431-C1
    7.5L CA OnlyManifold – RHF6TZ-9430-NA1
    7.5L CA OnlyManifold – LHF6TZ-9431-LA1



PART NUMBERPART NAME
391730-S101Bolt
391732-S101Stud
391729-S101Bolt
391845-S101Stud
F1HZ-9430-BExhaust Manifold
F4TZ-9430-CExhaust Manifold
F5TZ-9430-BExhaust Manifold
F1HZ-9431-BExhaust Manifold
F5TZ-9431-CExhaust Manifold
F6TZ-9430-NAExhaust Manifold
F4TZ-9431-CExhaust Manifold
F6TZ-9431-LAExhaust Manifold

OTHER APPLICABLE ARTICLES:

NONE

SUPERSEDES:

97-26-23

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage And Emissions Warranty Coverage

OPERATIONDESCRIPTIONTIME
981506ALReplace Exhaust Manifold, Left Side – 1993-96 E-350/E-Super Duty 7.5L1.5 Hrs.
981506ARReplace Exhaust Manifold, Right Side – 1993-96 E-350/E-Super Duty 7.5L2.7 Hrs.
981506ATReplace Exhaust Manifold, Both Sides – 1993-96 E-350/E-Super Duty 7.5L3.8 Hrs.
981506BLReplace Exhaust Manifold, Left Side – 1993-97 F-250HD/F-350/F-Super Duty 7.5L2.1 Hrs.
981506BRReplace Exhaust Manifold, Right Side – 1993-97 F-250HD/F-350/F-Super Duty 7.5L2.5 Hrs.
981506BTReplace Exhaust Manifold, Both Sides – 1993-97 F-250HD/F-350/F-Super Duty 7.5L4.4 Hrs.
981506CLReplace Exhaust Manifold, Left Side – 1992-97 F-700/F-800 7.0L1.2 Hrs.
981506CRReplace Exhaust Manifold, Right Side – 1992-97 F-700/F-800 7.0L1.2 Hrs.
981506CTReplace Exhaust Manifold, Both Sides – 1992-97 F-700/F-800 7.0L2.2 Hrs.

DEALER CODING

BASIC PART NO.CONDITION CODE
943012

OASIS CODES:

403000


Copyright © 1998 Ford Motor Company